Our reflective Sunglo couplet will allow up to 12" between dogs. Our couplet has strong brass bolt snaps and steel welded o rings. This dog couplet matches all of the sunglo reflective products. It is alailable in the follow colors Black, Blue, Green, Orange, Pink, Purple, Red and Yellow. The #144D-RF has 2 bolt snaps for 2 dogs and is $9.99. The #145D-RF has 3 bolt snaps for 3 dogs and is $12.99.